CN210037574U - Quantitative sampling pipeline of water quality detector - Google Patents

Abstract

The utility model discloses a quantitative sampling pipeline of a water quality detector, which comprises a peristaltic pump, a No. 1 liquid level sensor, a No. 1 three-way valve, a quantitative loop, a multi-way electromagnetic valve and a programmable controller; The liquid inlet assembly includes a liquid inlet pipe, a return pipe, a liquid outlet pipe and a No. 2 three-way valve. The common end of the No. 2 three-way valve is connected to the liquid inlet pipe, and the normally closed end is connected to the outlet. The liquid pipe and the normally open end are connected to the return pipe, the other end of the liquid inlet pipe receives the measuring water source, the other end of the liquid outlet pipe is connected to one of the container ports, and the other end of the return pipe is discharged. The liquid inlet component of the utility model can continuously sample the water source to be measured outside the liquid inlet component, thereby realizing continuous or periodic detection of sewage, without manual sampling before each detection, and ensuring the immediacy of detection and the efficiency of detection. accuracy.

Description

Quantitative sampling pipeline of water quality detector

technical field

The utility model relates to the field of water quality detection technology and equipment, in particular to a quantitative sampling pipeline of a water quality detector.

Background technique

With the development of science and technology, people's living standards are getting higher and higher, but the improvement of material life is also accompanied by aggravation of environmental pollution, especially water pollution. The water quality analyzer is a device for monitoring water quality. It has the advantages of accurate monitoring data and good real-time performance. Traditional environmental water quality testing is mainly based on manual sampling and laboratory instrument analysis. Although the analysis methods are complete in the laboratory, laboratory monitoring has shortcomings such as low monitoring frequency, large sampling error, scattered monitoring data, and inability to immediately reflect changes in pollution. With the enhancement of people's awareness of environmental protection and the improvement and strictness of relevant national policies, laws and regulations, high-quality instruments, micro-scale design, multi-parameter simultaneous measurement, modular thinking, and network informatization concepts have become the development trend of a new generation of instruments.

Patent Document 1 discloses a quantitative metering device for a water quality detector, which adopts a quantitative loop design. When excess sampling occurs, it can be discharged through a three-way solenoid valve, with accurate metering and convenient operation. The basic principle of the above quantitative metering device is shown in Figure 1. The actual water sample is temporarily stored in a water sample bottle, and the water sample is drawn into the metering device by a peristaltic pump, and then sent to the digestion tube for processing. This structure requires manual replenishment of samples for the water sample bottle during each test, which is cumbersome to operate, and cannot achieve continuous, real-time, online monitoring of water quality.

Patent Document 1: CN107860614A.

Utility model content

In order to realize continuous, immediate or periodic detection of water quality, the utility model provides a quantitative sampling pipeline of a water quality detector.

The technical scheme adopted by the utility model is as follows:

A quantitative sampling pipeline for a water quality detector, comprising: a peristaltic pump, a No. 1 liquid level sensor, a No. 1 three-way valve and a quantitative loop pipe connected in sequence; the other end of the peristaltic pump is emptied; The common end of the through valve is connected to the No. 1 liquid level sensor, the normally closed end is connected to the quantitative loop pipe, and the normally open end is drained; a multi-way solenoid valve, the multi-way solenoid valve includes a metering port, a liquid outlet port, and an air port and a container port, the metering port is a public port and communicates with the quantitative loop pipe, the liquid outlet port, the air port, the first container port and the second container port are split ports, and the liquid outlet port is connected to the digestion a tube assembly; a programmable controller, electrically connected with the multi-port solenoid valve, the No. 1 liquid level sensor, the No. 1 three-way valve, the peristaltic pump, the quantitative loop pipe and the digestion tube assembly; it also includes a liquid inlet assembly, the The liquid inlet assembly includes a liquid inlet pipe, a return pipe, a liquid outlet pipe and a No. 2 three-way valve. The common end of the No. 2 three-way valve is connected to the liquid inlet pipe, and the normally closed end is connected to the liquid outlet pipe and the normally open end. Connected to the return pipe, the other end of the liquid inlet pipe receives the water source for measurement, the other end of the liquid outlet pipe is connected to the second container port, and the other end of the return pipe is discharged; the liquid inlet pipe, The return pipe is respectively provided with a No. 1 on-off valve and a No. 2 on-off valve; the No. 2 three-way valve, No. 1 on-off valve, and No. 2 on-off valve are electrically connected with the programmable controller.

The beneficial effects of the utility model are: the water source to be measured outside the liquid inlet assembly of the utility model can continuously sample the water source to be measured, thereby realizing continuous or periodic detection of sewage without manual sampling before each detection. , to ensure the immediacy and accuracy of detection.

Preferably: a pipeline filter is provided on the liquid inlet pipe.

Preferably: the liquid inlet pipe is provided with a liquid inlet pump.

Preferably: the liquid inlet assembly further includes a water sample bottle and a No. 3 three-way valve, the common end of the No. 3 three-way valve is connected to the second container port through the liquid inlet main pipe, and the normally closed end is connected to the second container port through a backup pipe. The water sample bottle and the normally open end are connected with the liquid outlet pipe; the No. 3 three-way valve is electrically connected with the programmable controller.

Preferably, the liquid inlet assembly further includes a temporary storage bottle, the temporary storage bottle receives the incoming water from the liquid outlet pipe, and communicates with the second container port through a liquid suction pipe.

Preferably: the temporary storage bottle is equipped with a No. 2 liquid level sensor, and the No. 2 liquid level sensor is electrically connected to the programmable controller for detecting high liquid level.

Preferably, the temporary storage bottle is provided with a drain pipe, and the drain pipe is provided with a No. 3 on-off valve, and the No. 3 on-off valve is electrically connected to the programmable controller.

Preferably: the drain pipe is a drain pipe and is connected to the return pipe.

Description of drawings

FIG. 1 is a schematic diagram of the principle of Patent Document 1. As shown in FIG.

FIG. 2 is a schematic diagram of a pipeline according to an embodiment of the present invention.

Figure 3 is a schematic diagram of the pipeline of the second embodiment of the present invention.

FIG. 4 is a schematic diagram of the pipeline of the third embodiment of the present invention.

FIG. 5 is a schematic diagram of the pipeline of the fourth embodiment of the present invention.

Peristaltic pump P1, liquid inlet pump P2, No. 1 liquid level sensor G1, No. 2 liquid level sensor G2, No. 1 three-way valve V1, No. 2 three-way valve V2, No. 3 three-way valve V3, No. 1 switch valve H1, The second switch valve H2, the third switch valve H3, the quantitative loop LC, the multi-port solenoid valve D, the metering port c, the liquid outlet port a, the air port 1, the first container ports 2~4, 6~8, the second Container port 5, liquid inlet pipe L1, return pipe L2, liquid outlet pipe L3, liquid inlet main pipe L4, spare pipe L5, liquid suction pipe L6, liquid discharge pipe L7, pipe filter FI, water sample bottle 5A, temporary storage bottle 5B, the digestion tube assembly 100 , the programmable controller 200 , and the liquid inlet assembly 300 .

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

The present invention is an improvement made on the basis of Patent Document 1, so the specific structure of the phase digestion tube assembly 100, the principle of quantitative sampling and the like or similar contents will not be repeated.

In the embodiment, as shown in Figure 2: a quantitative sampling pipeline of a water quality detector, comprising: a peristaltic pump P1, a No. 1 liquid level sensor G1, a No. 1 three-way valve V1 and a quantitative loop pipe LC that are connected in sequence, The other end of the peristaltic pump P1 is emptied, the common end of the No. 1 three-way valve V1 is connected to the No. 1 liquid level sensor G1, the normally closed end is connected to the quantitative loop LC, and the normally open end is discharged; Valve D, the multi-way solenoid valve D includes a metering port c, a liquid outlet port a, an air port 1, a first container port 2-4, 6-8 and a second container port 5, and the metering port c is a common port , communicate with the quantitative loop LC, the liquid outlet port a, the air port 1 and the container ports 2 to 8 are split ports, and the liquid outlet port a is connected to the digestion tube assembly 100; the programmable controller 200, and The multi-port solenoid valve D, the No. 1 liquid level sensor G1, the No. 1 three-way valve V1, the peristaltic pump P1, the quantitative loop LC and the digestion tube assembly 100 are electrically connected; it also includes a liquid inlet assembly 300, the liquid inlet The assembly 300 includes a liquid inlet pipe L1, a return pipe L2, a liquid outlet pipe L3 and a No. 2 three-way valve V2. The common end of the No. 2 three-way valve V2 is connected to the liquid inlet pipe L1, and the normally closed end is connected to the outlet. The liquid pipe L3 and the normally open end are connected to the return pipe L2, the other end of the liquid inlet pipe L1 receives the measuring water source, the other end of the liquid outlet pipe L3 is connected to the second container port 5, and the other end of the return pipe L2 is connected to the second container port 5. The other end is discharged; the liquid inlet pipe L1 and the return pipe L2 are respectively provided with No. 1 on-off valve H1 and No. 2 on-off valve H2; the No. 2 three-way valve V2, No. 1 on-off valve H1, No. 2 on-off valve H2 It is electrically connected with the programmable controller 200 . The liquid inlet assembly 300 of this embodiment receives the water source to be measured outside, and can continuously sample the water source to be measured, thereby realizing continuous or periodic detection of sewage, without manual sampling before each detection, ensuring the immediacy of detection and accuracy.

In the embodiment, as shown in FIG. 2 : the liquid inlet pipe L1 is provided with a pipeline filter FI. The pipeline filter FI can perform a preliminary physical filtration of the water source to be tested, so as to prevent impurities in the sewage from clogging the finer pipelines inside the detector. In this embodiment, a Y-type filter, which is more convenient to clean, is selected.

In the embodiment, as shown in FIG. 2 : the liquid inlet pipe L1 is provided with a liquid inlet pump P2. Generally speaking, the water source to be tested cannot naturally form a stable flow, so the liquid inlet pump P2 is required to assist in order to form a stable and slow water flow to ensure that the sewage can smoothly enter the detector under the action of the peristaltic pump P1.

In the second embodiment, as shown in FIG. 3 : the liquid inlet assembly 300 further includes a water sample bottle 5A and a No. 3 three-way valve V3, and the common end of the No. 3 three-way valve V3 is communicated through the liquid inlet manifold L4 The second container port 5 and the normally closed end are connected to the water sample bottle 5A through a spare pipe L5, and the normally open end is connected to the liquid outlet pipe L3; the No. 3 three-way valve V3 is electrically connected to the programmable controller 200 . The water sample bottle 5A in this embodiment is used as a backup sampling source, but the external environment forms a good water flow, so that when sampling is difficult, the water sample bottle 5A can be used for manual sampling, thereby ensuring the versatility and adaptability of the instrument.

In the third embodiment, as shown in FIG. 4 : the liquid inlet assembly 300 further includes a temporary storage bottle 5B, the temporary storage bottle 5B receives the incoming water from the liquid outlet pipe L3, and is connected to the liquid outlet pipe L6 through the liquid suction pipe L6. The second container port 5 communicates. As a temporary storage space for samples, the temporary storage bottle 5B in this embodiment has two functions, one is to avoid the impact of external water flow on the internal pipeline of the instrument, and the other is to reduce air bubbles in the internal pipeline of the instrument to ensure the accuracy of quantitative feeding sex.

In the third embodiment, as shown in FIG. 4 : the temporary storage bottle 5B is equipped with a No. 2 liquid level sensor G2 , and the No. 2 liquid level sensor G2 is electrically connected to the programmable controller 200 for Detect high liquid level. The No. 2 liquid level sensor G2 in this embodiment will issue an alarm or stop the device when the liquid level in the temporary storage bottle 5B exceeds the limit, so as to avoid damage to the equipment.

In the third embodiment, as shown in FIG. 4 : the temporary storage bottle 5B is provided with a drain pipe L7, and the drain pipe L7 is provided with a No. 3 on-off valve H3, the No. 3 on-off valve H3 and the The programmable controller 200 is electrically connected. The drain pipe L7 in this embodiment is used for draining the liquid, so as to avoid the flooding of the temporary storage bottle 5B.

In the third embodiment, as shown in FIG. 4 , the drain pipe L7 is a drain pipe and is connected to the return pipe L2. The liquid drain pipe L7 in this embodiment is disposed at the bottom of the temporary storage bottle 5B, so the liquid bottle of the temporary storage bottle 5B can be drained, and mutual interference between different water sources to be tested can be avoided.

The fourth embodiment, as shown in FIG. 5 , is actually a combination of the second and third embodiments, and has two devices, a water sample bottle 5A and a temporary storage bottle 5B. The structure is more complicated, but the function relatively perfect.

Obviously, the above-mentioned embodiments of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. All implementations need not and cannot be exhaustive here. And these obvious changes or changes that are derived from the essential spirit of the present invention still belong to the protection scope of the present invention.

Claims (8)

1. A quantitative sampling pipeline for a water quality detector, comprising: The peristaltic pump (P1), the No. 1 liquid level sensor (G1), the No. 1 three-way valve (V1) and the quantitative loop pipe (LC) are connected in sequence. The other end of the peristaltic pump (P1) is emptied, and the No. 1 The common end of the three-way valve (V1) is connected to the No. 1 liquid level sensor (G1), the normally closed end is connected to the quantitative loop (LC), and the normally open end is discharged; A multi-port solenoid valve (D), the multi-port solenoid valve (D) includes a metering port (c), a liquid outlet port (a), an air port (1), and a first container port (2~4, 6~8) and the second container port (5), the metering port (c) is a common port and communicates with the quantitative loop (LC), the liquid outlet port (a), the air port (1), the first container port ( 2~4, 6~8) and the second container port (5) are split ports, and the liquid outlet port (a) is connected to the digestion tube assembly (100); A programmable controller (200), with the multi-port solenoid valve (D), the No. 1 liquid level sensor (G1), the No. 1 three-way valve (V1), the peristaltic pump (P1), the quantitative loop pipe (LC) and The digestion tube assembly (100) is electrically connected; It is characterized by: Also includes a liquid inlet assembly (300), the liquid inlet assembly (300) includes a liquid inlet pipe (L1), a return pipe (L2), a liquid outlet pipe (L3) and a No. 2 three-way valve (V2), the two The common end of the three-way valve (V2) is connected to the liquid inlet pipe (L1), the normally closed end is connected to the liquid outlet pipe (L3), the normally open end is connected to the return pipe (L2), and the liquid inlet pipe ( The other end of L1) receives the measuring water source, the other end of the liquid outlet pipe (L3) is connected to the second container port (5), and the other end of the return pipe (L2) is discharged; the liquid inlet pipe ( L1) and return pipe (L2) are respectively provided with No. 1 on-off valve (H1) and No. 2 on-off valve (H2); the No. 2 three-way valve (V2), No. 1 on-off valve (H1), No. 2 on-off valve (H2) is electrically connected with the programmable controller (200). 2. The quantitative sampling pipeline of the water quality detector according to claim 1, characterized in that: a pipeline filter (FI) is provided on the liquid inlet pipe (L1). 3 . The quantitative sampling pipeline of the water quality detector according to claim 1 , characterized in that: the liquid inlet pipe ( L1 ) is provided with a liquid inlet pump (P2 ). 4 . 4. The quantitative sampling pipeline of the water quality detector according to claim 1, characterized in that: the liquid inlet assembly (300) further comprises a water sample bottle (5A) and a No. 3 three-way valve (V3), so The common end of the No. 3 three-way valve (V3) is connected to the second container port (5) through the liquid inlet main pipe (L4), and the normally closed end is connected to the water sample bottle (5A) and the normal closed end through the spare pipe (L5). The opening end communicates with the liquid outlet pipe (L3); the No. 3 three-way valve (V3) is electrically connected with the programmable controller (200). 5. The quantitative sampling pipeline of the water quality detector according to claim 1, characterized in that: the liquid inlet assembly (300) further comprises a temporary storage bottle (5B), and the temporary storage bottle (5B) accepts the The water coming from the liquid pipe (L3) is communicated with the second container port (5) through the liquid suction pipe (L6). 6. The quantitative sampling pipeline of the water quality detector according to claim 5, characterized in that: the temporary storage bottle (5B) is equipped with a No. 2 liquid level sensor (G2), and the No. 2 liquid level sensor ( G2) is electrically connected to the programmable controller (200) for detecting high liquid level. 7. The quantitative sampling pipeline of the water quality detector according to claim 5, characterized in that: the temporary storage bottle (5B) is provided with a drain pipe (L7), and the drain pipe (L7) is provided with a drain pipe (L7). There is a No. 3 on-off valve (H3), and the No. 3 on-off valve (H3) is electrically connected to the programmable controller (200). 8 . The quantitative sampling pipeline of the water quality detector according to claim 7 , wherein the liquid drain pipe ( L7 ) is a clean drain pipe and is connected to the return pipe ( L2 ). 9 .

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